This chapter provides information about configuring high availability features on the Cisco 7600 Series Ethernet Services Plus (ES+) and Ethernet Services Plus T (ES+T) line card on the Cisco 7600 series router.
Note The information provided in this chapter is applicable to both the ES+ and ES+T line cards unless specified otherwise.
ISSU Support for Cisco 7600 Series Ethernet Services Plus Line Card
The Cisco 7600 Series ES+ line card supports In-Service Software Upgrade (ISSU) with Enhanced Fast Software Upgrade (eFSU). ISSU allows for the upgrade and downgrade of Cisco IOS images at different release levels on the active and standby supervisors. ISSU procedure also applies to upgrade and downgrade of line card images. A new line card image is loaded, as necessary, when the supervisor engine software is upgraded or downgraded.